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OALib Journal期刊
ISSN: 2333-9721
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木粉、废旧橡胶和高密度聚乙烯复合材料的热解动力学特性
DOI: 10.3969/j.issn.1000-2006.2014.06.026, PP. 135-140
Keywords: 废旧橡胶,热解动力学,表观活化能,热重分析
Abstract:
将木粉、高密度聚乙烯(hdpe)与不同含量的废旧橡胶粉复合制备木橡塑复合材料,采用热重分析法(tga)研究各组分材料及复合材料的热解动力学特性,并引入flynn-wall-ozawa模型量化了组分及复合材料的表观活化能。结果表明:木粉、hdpe、废旧橡胶粉复合材料(wrpc)的热解出现两个显著的失重区(230～380℃和430～580℃),分别对应木粉/废旧橡胶和hdpe的热降解。木粉、废旧橡胶和hdpe热解过程平均活化能值分别为179.2、243.8和246.8kj/mol,wpc(木粉、hdpe复合材料)平均活化能为239.3kj/mol,wrpc活化能值较wpc低(200.3～208.4kj/mol)。活化能的变化表明木、橡、塑3种原料在复合材料的热解过程中具有协同效应,而废旧橡胶的掺入对复合材料的热降解特性发挥了显著的调控作用。
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